CVE-2026-55011: Integer underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to execute code locally.

PriorityP345high7.8CVSS 3.1

AVLACLPRNUIRSUCHIHAH

EPSS

0.42%

34.3th percentile

Integer underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to execute code locally.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
microsoft	microsoft_malware_protection_engine	>= 1.1.0.0 < 1.1.26060.3008	1.1.26060.3008

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